---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/52310#article
headline: "52310: Notification TTL has expired"
url: https://www.twilio.com/docs/api/errors/52310
inLanguage: en
dateModified: 2026-06-09T11:00:42.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 52310: Notification TTL has expired

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when a notification is still being processed or waiting for delivery after its `ttl` value has expired. In Notify, `ttl` defines how long a notification remains valid, from `0` to `2419200` seconds. A value of `0` allows only an immediate delivery attempt and does not store the notification for later delivery.

### Possible causes

* The request used a `ttl` value that was too short for the number of recipients or bindings being processed.
* The notification targeted identities or tags that required more processing time, and the service hit normal Notify throughput limits during that window. Notify services have a default limit of 100 notifications per second per service instance, with higher throughput available by request.
* A push recipient device was offline until the `ttl` elapsed, so Notify could no longer attempt delivery.

### Possible solutions

* Increase the `ttl` value so the notification stays valid long enough for processing and delivery. Use a value that matches your expected delivery window and keep it within `0` to `2419200` seconds.
* Avoid using a `ttl` of `0` unless you want a single immediate attempt with no stored delivery for offline devices.
* Reduce the number of recipients in a single request or spread large sends across multiple requests so your traffic stays within your service's throughput expectations.
* Review your Notify service logs in Console to confirm whether the request was accepted and to review delivery attempts for the affected notification. ([help.twilio.com](https://help.twilio.com/articles/115016131208-Troubleshooting-Issues-with-Twilio-Notify))
* If you are planning new notification workflows, move SMS notifications to Programmable Messaging and use platform-specific push services such as APNs or FCM. Notify was deprecated in October 2022 and reaches end of life for existing customers on January 31, 2027.

#### Additional resources

* [Notification Resource](/docs/notify/api/notification-resource)
* [Notify Limits](/docs/notify/notify-limits)
* [How to transition off Notify?](https://help.twilio.com/articles/9198083260571)